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Pixel circuit, display device, and driving method thereof

  • US 20080225027A1
  • Filed: 03/11/2008
  • Published: 09/18/2008
  • Est. Priority Date: 03/16/2007
  • Status: Abandoned Application
First Claim
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1. A display device comprising:

  • a pixel array unit configured to include pixel circuits arranged in a form of a matrix, said pixel circuits each including a drive transistor for generating a driving current, an electrooptic element connected to an output terminal of said drive transistor, a storage capacitor for retaining information corresponding to a signal potential of a video signal, a sampling transistor for writing the information corresponding to said signal potential to said storage capacitor, and a capacitive element having one terminal connected to the output terminal of said drive transistor and having another terminal supplied with a pulse signal, said drive transistor generating the driving current based on the information retained in said storage capacitor and sending the driving current through said electrooptic element, whereby said electrooptic element emits light; and

    a control unit configured to include a writing scanning unit for outputting, to said sampling transistor, a writing scanning pulse for performing line-sequential scanning of said pixel circuits by sequentially controlling said sampling transistor in a horizontal period and writing information corresponding to a signal potential of a video signal to each of storage capacitors in one row, and a horizontal driving unit for supplying a video signal for one row to a video signal line according to a signal potential writing operation of said sampling transistor;

    wherein said control unit effects control to perform mobility correcting operation for, after said sampling transistor is set in a conducting state and the information corresponding to said signal potential is retained in said storage capacitor, adding an amount of correction for mobility of said drive transistor to the information written in said storage capacitor while said sampling transistor is held in the conducting state, the other terminal of said capacitive element is supplied with information corresponding to a pulse for starting said mobility correcting operation, andthe output terminal of said drive transistor is supplied via said capacitive element with transition information in a direction of increasing a potential difference between a control input terminal and the output terminal of said drive transistor.

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